Radio frequency power amplifier and radio frequency front-end module

Abstract

Disclosed in the present application is a radio frequency power amplifier, comprising a first power amplification unit, a second power amplification unit, and a signal synthesis network. The signal synthesis network comprises a first winding and a second winding which are connected to the first power amplification unit and the second power amplification unit, and a third winding and a fourth winding which are connected in parallel. By making the sum of the number of coils in the third winding and the fourth winding which are coupled to the first winding equal to the sum of the number of coils in the third winding and the fourth winding which are coupled to the second winding, the problem of excessive loss caused by poor balance of the signal synthesis network in the radio frequency power amplifier is ameliorated, thereby improving the power synthesis efficiency of the radio frequency power amplifier.

Description

RF power amplifier and RF front-end module

[0001] This application is based on the Chinese application number 202311104287.8 filed on August 30, 2023, entitled "RF Power Amplifier and RF Front-end Module", and claims priority. Technical Field

[0002] The present application relates to the field of radio frequency technology, and in particular to a radio frequency power amplifier and a radio frequency front-end module. Background Art

[0003] RF power amplifiers are widely used in mobile devices. With the development of communication systems, higher performance requirements are being placed on RF power amplifiers. RF power amplifier design specifications typically include output power, loss, efficiency, gain, bandwidth, and linearity. Loss and efficiency have been a focus of particular attention, and RF power amplifier power loss has become a key performance indicator for measuring amplifier efficiency and plays a crucial role in the overall communication system.

[0004] Application Contents

[0005] The embodiments of the present application provide a radio frequency front-end module and a radio frequency front-end module to solve the problem of large power loss of the radio frequency front-end module.

[0006] A radio frequency power amplifier, comprising: a first power amplification unit, a second power amplification unit and a signal synthesis network; the signal synthesis network comprises a first winding, a second winding, a third winding and a fourth winding; the first power amplification unit is connected to the first winding, and the second power amplification unit is connected to the second winding; the first end of the third winding and the first end of the fourth winding are connected to a ground terminal, and the second end of the third winding and the second end of the fourth winding are connected to a signal transmission terminal; the third winding comprises n coils M={m1,m2,m3,...,m n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected to the ground terminal, and the nth coil m n One end of the signal transmission end is connected to the signal transmission end;

[0007] The fourth winding includes n coils K={k1, k2, k3, . . . , k n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected to the ground terminal, and the nth coil k nOne end of the third winding is connected to the signal transmission end; wherein the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

[0008] Furthermore, the coil in the third winding coupled with the first winding, the coil in the fourth winding coupled with the first winding, and the first winding form a first coupling area; the coil in the third winding coupled with the second winding, the coil in the fourth winding coupled with the second winding, and the second winding form a second coupling area; wherein the first coupling area and the second coupling area are adjacent and non-overlapping areas.

[0009] Furthermore, the coil m1 in the third winding is coupled to the first winding, and the coil m n The coil k1 in the fourth winding is coupled with the second winding, and the coil k in the fourth winding is coupled with the second winding. n coupled with the first winding;

[0010] Alternatively, the coil m1 in the third winding is coupled to the second winding, and the coil m in the third winding is coupled to the second winding. n The coil k1 in the fourth winding is coupled to the first winding, and the coil k in the fourth winding is coupled to the first winding. n coupled with the second winding.

[0011] Furthermore, the grounding end of the third winding is arranged at the inner periphery of the first coupling region, the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region and / or the second coupling region, the grounding end of the fourth winding is arranged at the inner periphery of the second coupling region, and the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region and / or the second coupling region;

[0012] Alternatively, the grounding end of the third winding is arranged at the inner periphery of the second coupling region, the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region and / or the second coupling region, the grounding end of the fourth winding is arranged at the inner periphery of the first coupling region, and the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region and / or the second coupling region.

[0013] Furthermore, with the signal transmission end of the third winding as the starting point, the coil in the third winding coupled with the first winding is wound along the first direction, and the coil in the third winding coupled with the second winding is wound along the second direction; with the signal transmission end of the fourth winding as the starting point, the coil in the fourth winding coupled with the second winding is wound along the second direction, and the coil in the fourth winding coupled with the first winding is wound along the first direction; wherein, the first direction is clockwise and the second direction is counterclockwise, or, the first direction is counterclockwise and the second direction is clockwise.

[0014] Furthermore, the third winding and the fourth winding are respectively arranged in different metal layers, or the third winding and the fourth winding are both arranged in the same metal layer.

[0015] Some of the n coils M of the third winding are arranged in one metal layer, and another part of the coils are arranged in another metal layer, and / or some of the n coils N of the fourth winding are arranged in one metal layer, and another part of the coils are arranged in another metal layer.

[0016] Furthermore, the first winding and the second winding are arranged in the second metal layer, the third winding is arranged in the first metal layer, and the fourth winding is arranged in the first metal layer. The third winding at least partially overlaps with the projection of the first winding and the second winding in the vertical direction, and the four windings at least partially overlap with the projection of the first winding and the second winding in the vertical direction.

[0017] Furthermore, the first winding includes a first primary coil and a second primary coil; the second winding includes a third primary coil and a fourth primary coil; the first primary coil, the third primary coil and the third winding are arranged on the same metal layer, and the third winding is coupled with the first primary coil and the third primary coil on the same layer; the second primary coil, the fourth primary coil and the fourth winding are arranged on the same metal layer, and the fourth winding is coupled with the second primary coil and the fourth primary coil on the same layer.

[0018] Furthermore, the set M of the third winding coupled with the first winding 11 ={m a1 ,m a2 ,m a3 ,...,m an}, and the set K of coil numbers {a1, a2, a3...an} in the fourth winding coupled with the second winding. 21 ={k a1 ,k a2 ,k a3 ,...,kan} have the same coil number {a1, a2, a3...an}; the set M of the third winding coupled with the second winding 21 ={m b1 ,m b2 ,m b3 ,...,m bn} and the set K of coil numbers {b1, b2, b3...bn} in the fourth winding coupled with the first winding 11 ={k b1 ,k b2 ,k b3 ,...,k bn}, the coil numbers {b1, b2, b3...bn} in the same.

[0019] Further, the first winding is coupled with the odd-numbered coils in the third winding; the second winding is coupled with the even-numbered coils in the third winding, and the first winding is coupled with the even-numbered coils in the fourth winding; the second winding is coupled with the odd-numbered coils in the fourth winding; or, the first winding is coupled with the even-numbered coils in the third winding; the second winding is coupled with the odd-numbered coils in the third winding, and the first winding is coupled with the odd-numbered coils in the fourth winding; and the second winding is coupled with the even-numbered coils in the fourth winding.

[0020] Furthermore, the coil set M in the first winding and the third winding 11 coupling,

[0021] M 11 ={m1,m4,m5,m8,m9,...m n-2 ,m n-1}, where the coil set M 11 The serial number of the coil at the odd position is plus 3 to be the next coil, and the serial number of the coil at the even position is plus 1 to be the next coil; the coil set M in the second winding and the third winding 21 Coupling, M 21 ={m2,m3,m6,m7,m 10 ,...m m-3 ,m n}, where the coil set M 21 The number of the coil at the even position is increased by 1 to become the next coil; and the number of the coil at the odd position is increased by 3 to become the next coil; the coil set k in the first winding and the fourth winding 11 Coupling, k 11 ={k2,k3,k6,k7,k 10 ,...k m-3 ,kn}, where the coil set k 11 The number of the coil at the even position is increased by 1 to become the next coil; and the number of the coil at the odd position is increased by 3 to become the next coil; the coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k4,k5,k8,k9,...k n-2 ,k n-1}, where the coil set K 21 The serial number of the coil at the odd position is plus 3 to be the next coil, and the serial number of the coil at the even position is plus 1 to be the next coil.

[0022] Furthermore, the coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m2,m5,m6,m9,...m n-1 ,m n}, where the coil set M 11 The serial number of the coil at the odd position is plus 1 to be the next coil, and the serial number of the coil at the even position is plus 3 to be the next coil; the coil set M in the second winding and the third winding 21 Coupling, M 21 ={m3,m4,m7,m8,m 11 ,...m m-3 ,m m-2}, where the coil set M 21 The number of the coil at the odd position is increased by 1 to become the next coil; and the number of the coil at the even position is increased by 3 to become the next coil; the coil set K in the first winding and the fourth winding 11 Coupling, K 11 ={k3,k4,k7,k8,k 11 ,...k n-3 ,k n-2}, where the coil set K 11 The number of the coil at the odd position is increased by 1 to become the next coil; and the number of the coil at the even position is increased by 3 to become the next coil; the coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k2,k5,k6,k9,...k n-1 ,k n}, where the coil set K 21 The serial number of the coil at the odd position is increased by 1 to become the next coil, and the serial number of the coil at the even position is increased by 3 to become the next coil.

[0023] Furthermore, the n coils M of the third winding are arranged in different metal layers, and are divided into different coils in different metal layers, and are divided into different coils in different areas of the same metal layer, and are divided into different coils at different levels in the same area; the n coils K of the third winding are arranged in different metal layers, and are divided into different coils in different metal layers, and are divided into different coils in different areas of the same metal layer, and are divided into different coils at different levels in the same area.

[0024] Further, the first power amplifying unit includes a first amplifying transistor, and the second power amplifying unit includes a second amplifying transistor; the input end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the input end of the second amplifying transistor is connected to the second end of the second winding; or, the output end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the output end of the second amplifying transistor is connected to the second end of the second winding.

[0025] Further, the first power amplifying unit includes a first amplifying transistor, and the second power amplifying unit includes a second amplifying transistor; the input end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is grounded or the power supply end, and the input end of the second amplifying transistor is connected to the first end of the second winding, and the second end of the second winding is grounded or the power supply end; or, the output end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is grounded or the power supply end, and the output end of the second amplifying transistor is connected to the first end of the second winding, and the second end of the second winding is grounded or the power supply end.

[0026] Further, the first power amplifying unit includes a first amplifying transistor and a third amplifying transistor, and the first power amplifying unit includes a second amplifying transistor and a fourth amplifying transistor; the input end of the first amplifying transistor is connected to the first end of the first winding, the input end of the third amplifying transistor is connected to the second end of the first winding, the input end of the second amplifying transistor is connected to the second end of the second winding, and the input end of the fourth amplifying transistor is connected to the first end of the second winding; or, the output end of the first amplifying transistor is connected to the first end of the first winding, the output end of the third amplifying transistor is connected to the second end of the first winding, the output end of the second amplifying transistor is connected to the second end of the second winding, and the output end of the fourth amplifying transistor is connected to the first end of the second winding.

[0027] Furthermore, the first amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the first amplifying transistor is the input terminal of the first amplifying transistor, the collector of the first amplifying transistor is the output terminal of the first amplifying transistor, and the emitter of the first amplifying transistor is grounded; the second amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the second amplifying transistor is the input terminal of the second amplifying transistor, the collector of the second amplifying transistor is the output terminal of the second amplifying transistor, and the emitter of the second amplifying transistor is grounded; the third amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the third amplifying transistor is the input terminal of the third amplifying transistor, the collector of the third amplifying transistor is the output terminal of the third amplifying transistor, and the emitter of the third amplifying transistor is grounded; the fourth amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the fourth amplifying transistor is the input terminal of the fourth amplifying transistor, the collector of the fourth amplifying transistor is the output terminal of the fourth amplifying transistor, and the emitter of the fourth amplifying transistor is grounded. The emitter of the body transistor is grounded; or, the first amplifying transistor is a MOS transistor, including a gate, a source and a drain, the gate of the first amplifying transistor is the input terminal of the first amplifying transistor, the source of the first amplifying transistor is the output terminal of the first amplifying transistor, and the drain of the first amplifying transistor is grounded; the second amplifying transistor is a MOS transistor, including a gate, a source and a drain, the gate of the second amplifying transistor is the input terminal of the second amplifying transistor, the source of the second amplifying transistor is the output terminal of the second amplifying transistor, and the drain of the second amplifying transistor is grounded; the third amplifying transistor is a MOS transistor, including a gate, a source and a drain, the gate of the third amplifying transistor is the input terminal of the third amplifying transistor, the source of the third amplifying transistor is the output terminal of the third amplifying transistor, and the drain of the third amplifying transistor is grounded; the fourth amplifying transistor is a MOS transistor, including a gate, a source and a drain, the gate of the fourth amplifying transistor is the input terminal of the fourth amplifying transistor, the source of the fourth amplifying transistor is the output terminal of the fourth amplifying transistor, and the drain of the fourth amplifying transistor is grounded.

[0028] Furthermore, the first end of the third winding is connected to the ground end through a first capacitor, and the first end of the fourth winding is connected to the ground end through a second capacitor; the first capacitor is set within the first coupling region, and the second capacitor is set within the second coupling region, or the first capacitor is set outside the second coupling region, and the second capacitor is set outside the first coupling region.

[0029] Furthermore, the first end of the third winding and the first end of the fourth winding are connected and then connected to the ground via a third capacitor, and the third capacitor is arranged outside the first coupling region and outside the second coupling region.

[0030] A radio frequency front-end module comprises: a substrate and a first chip and a signal synthesis network arranged on the substrate, wherein the first chip comprises a first power amplification unit and a second power amplification unit; the signal synthesis network comprises a first winding, a second winding, a third winding and a fourth winding; the first power amplification unit is connected to the first winding, and the second power amplification unit is connected to the second winding; the first end of the third winding and the first end of the fourth winding are connected to a ground terminal, and the second end of the third winding and the second end of the fourth winding are connected to a signal transmission terminal; the third winding comprises n coils M={m1,m2,m3,...,m n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected to the ground terminal, and the nth coil m n One end of the fourth winding is connected to the signal transmission end; the fourth winding includes n coils K={k1, k2, k3, ..., k n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected to the ground terminal, and the nth coil k n one end of the third winding is connected to the signal transmission end; the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

[0031] The radio frequency power amplifier includes a power amplification circuit and a signal synthesis network, wherein the signal synthesis network includes a first winding, a second winding, a third winding and a fourth winding; the power amplification circuit is connected to the first winding and the second winding; the first end of the third winding and the first end of the fourth winding are connected to the ground terminal, and the second end of the third winding and the second end of the fourth winding are connected to the signal transmission terminal; the third winding includes n coils M={m1,m2,m3,...,m n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected to the ground terminal, and the nth coil m nOne end of the fourth winding is connected to the signal transmission end; the fourth winding includes n coils K={k1, k2, k3, ..., k n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected to the ground terminal, and the nth coil k n One end of the third winding is connected to the signal transmission end; the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n; the signal synthesis network in this embodiment includes a first winding and a second winding connected to the first power amplification unit and the second power amplification unit, and a third winding and a fourth winding connected in parallel. By making the sum of the number of coils in the third winding and the fourth winding coupled with the first winding the same as the sum of the number of coils in the third winding and the fourth winding coupled with the second winding, the problem of excessive loss in the signal synthesis network in the RF power amplifier is improved, thereby improving the power synthesis efficiency of the RF power amplifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] FIG1 is a schematic structural diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0034] FIG2 is another structural diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0035] FIG3 is a circuit diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0036] FIG4 is another circuit diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0037] FIG5 is another circuit diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0038] FIG6 is another circuit diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0039] FIG7 is another circuit diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0040] FIG8 is another circuit diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0041] FIG9 is a simulation diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0042] FIG10 is another simulation diagram of a radio frequency power amplifier according to an embodiment of the present application;

[0043] FIG11 is another simulation diagram of the radio frequency power amplifier in one embodiment of the present application.

[0044] In the figure, 10, first power amplifying unit; 20, second power amplifying unit; 11, first amplifying transistor; 12, second amplifying transistor; 21, third amplifying transistor; 22, fourth amplifying transistor; 301, first winding; 302, second winding; 303, third winding; 304, fourth winding; 40, post-stage circuit. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] It should be understood that the present application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the disclosure thorough and complete and to fully convey the scope of the present application to those skilled in the art. In the drawings, the dimensions and relative dimensions of layers and regions may be exaggerated for clarity. Like reference numerals denote like elements throughout.

[0047] It should be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" another element or layer, it may be directly on, adjacent to, connected to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are merely used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present application, the first element, component, region, layer, or part discussed below may be represented as a second element, component, region, layer, or part.

[0048] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the drawings is flipped, then the elements or features described as "under" or "beneath" or "beneath" the other elements will be oriented as "over" the other elements or features. Thus, the exemplary terms "under" and "under" may include both the upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0049] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present application. When used herein, the singular forms "a", "an", and " / the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, identify the presence of features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0050] In order to fully understand the present application, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed by the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods.

[0051] This embodiment provides a radio frequency power amplifier for use in a radio frequency front-end module. An radio frequency front-end module is a device that integrates two or more discrete components, such as a radio frequency switch, a low-noise amplifier, a filter, a duplexer, a power amplifier, and a transformer, into a single module. This improves the module's integration and hardware performance, while miniaturizing its size. Specifically, the module can be used in devices such as smartphones, tablets, and smartwatches; it can operate in 2G, 3G, 4G, 5G, or Wi-Fi frequency bands.

[0052] In at least one embodiment, a radio frequency power amplifier is proposed, as shown in Figures 1 to 8, including a first power amplification unit, a second power amplification unit and a signal synthesis network 30, wherein the signal synthesis network includes a first winding 301, a second winding 302, a third winding 303 and a fourth winding 304.

[0053] The first power amplifying unit is connected to the first winding, and the second power amplifying unit is connected to the second winding. The first end of the third winding 303 and the first end of the fourth winding 304 are connected to the ground, and the second end of the third winding 303 and the second end of the fourth winding 304 are connected to the signal transmission end. The first end of the third winding 303 and the first end of the fourth winding 304 can be connected to the same ground or to different grounds.

[0054] The third winding 303 includes n coils M={m1, m2, m3, ..., m n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected to the ground terminal, and the nth coil m n One end is connected to the signal transmission end.

[0055] The fourth winding 304 includes n coils K={k1, k2, k3, . . . , k n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected to the ground terminal, and the nth coil k n One end is connected to the signal transmission end.

[0056] The sum of the number of coils in the third winding 303 coupled to the first winding 301 and the number of coils in the fourth winding 304 coupled to the first winding 301 is n; the sum of the number of coils in the third winding 303 coupled to the second winding 302 and the number of coils in the fourth winding 404 coupled to the second winding 302 is n; by making the sum of the number of coils in the third winding and the fourth winding coupled to the first winding the same as the sum of the number of coils in the third winding and the fourth winding coupled to the second winding, the balance of the signal synthesis network in the RF power amplifier can be improved, thereby improving the impedance / phase imbalance between the first power amplification unit and the second power amplification unit, thereby solving the problem of excessive loss in the RF power amplifier, and thereby improving the power synthesis efficiency of the RF power amplifier.

[0057] Optionally, the RF power amplifier can be any type of amplifier circuit such as a differential power amplifier circuit, a Doherty power amplifier circuit, a balanced power amplifier circuit, a dual single-ended combined power amplifier circuit, a dual differential power amplifier circuit, etc. This embodiment does not specifically limit the type of power amplifier circuit.

[0058] Optionally, the signal synthesis network may be an input-end signal synthesis network or an output-end signal synthesis network. For example, the signal synthesis network may be an input-end signal synthesis network connected to the input end of the power amplifier circuit. Alternatively, the signal synthesis network may be an output-end signal synthesis network connected to the output end of the power amplifier circuit.

[0059] In at least one embodiment, as shown in Figure 2 below, the RF power amplifier is a dual single-ended combined power amplifier circuit, the first output end of the dual single-ended combined power amplifier circuit is connected to the first end of the first winding 301, the second end of the first winding 301 is grounded or connected to the power supply end, the second output end of the dual single-ended combined power amplifier circuit is connected to the first end of the second winding 302, and the second end of the second winding 302 is grounded or connected to the power supply end.

[0060] In at least one embodiment, as shown in FIG3 below, the RF power amplifier is a dual differential power amplifier circuit, that is, the power amplifier circuit includes two differential amplifier circuits, namely a first differential amplifier circuit and a second differential amplifier circuit. The first output terminal of the first differential amplifier circuit is connected to the first end of the first winding 301, and the second output terminal of the first differential amplifier circuit is connected to the second end of the first winding 301; the first output terminal of the second differential amplifier circuit is connected to the first end of the second winding 302, and the second output terminal of the second differential amplifier circuit is connected to the second end of the second winding 303.

[0061] In at least one embodiment, the first winding 301 and the second winding 302 are arranged on the same metal layer, the first winding 301 can be a separate coil, the second winding 302 can be a separate coil, or the first winding 301 can be a non-separate complete coil, the second winding 302 can be a non-separate complete coil.

[0062] In at least one embodiment, the third winding and the fourth winding may be disposed on different metal layers. For example, the n coils M of the third winding are disposed on a first metal layer, and the n coils K of the fourth winding are disposed on a second metal layer. Alternatively, the third winding and the fourth winding may both be disposed on the same metal layer. For example, the n coils M of the third winding and the n coils K of the fourth winding may both be disposed on a first metal layer.

[0063] In at least one embodiment, some of the n coils M of the third winding are arranged in one metal layer, and another part of the coils are arranged in another metal layer, and some of the n coils K of the fourth winding are arranged in one metal layer, and another part of the coils are arranged in another metal layer. For example, some of the n coils M of the third winding are arranged in the first metal layer, and another part of the coils are arranged in the second metal layer, and some of the n coils K of the fourth winding are arranged in the first metal layer, and another part of the coils are arranged in the second metal layer.

[0064] In at least one embodiment, the third winding 303 and the fourth winding 304 may be arranged on the same metal layer as the first winding 301 and the second winding 302 to achieve same-layer side coupling between the third winding 303 and the fourth winding 304 and the first winding 301 and the second winding 302. The third winding 303 and the fourth winding 304 may also be arranged on different metal layers from the first winding 301 and the second winding 302 to achieve upper and lower layer coupling between the third winding 303 and the fourth winding 304 and the first winding 301 and the second winding 302.

[0065] In at least one embodiment, the third winding 303 and the fourth winding 304 can be arranged in the same metal layer or different metal layers; the third winding 303 and the fourth winding 304 are connected in parallel. The n coils M included in the third winding 303 can be arranged in the same metal layer or different metal layers, and can be divided into different coils in different metal layers, or divided into different coils in different areas of the same metal layer, or divided into different coils at different levels of the same area. Similarly, the n coils N included in the fourth winding 304 can be arranged in the same metal layer or different metal layers, and can be divided into different coils in different metal layers, or divided into different coils in different areas of the same metal layer, or divided into different coils at different levels of the same area. It should be noted that the levels in different levels of the same area refer to the inner and outer levels in the same area of ​​the same metal layer.

[0066] In this embodiment, the length, actual size, and shape of each coil can be the same or different. The length, actual size, and shape of a coil are not limited in this embodiment. It is understandable that, since this embodiment divides coils arranged in different metal layers into different coils, divides coils arranged in different regions of the same metal layer into different coils, and divides coils arranged at different levels of the same region into different coils, a coil in this embodiment can be a coil wound to form a full circle, or a coil wound to form a half circle, a third circle, or two-thirds of a circle, or any other length and shape. It should be noted that a full circle in this embodiment does not mean a full circle forming a closed loop, i.e., the two ends of a full circle are not connected. In a specific embodiment, the n coils included in the third winding are divided into one coil if they are wound to form a full circle. If the two ends of the third winding form a non-full circle during the winding process (for example, a coil wound to form a half circle, a third circle, or two-thirds of a circle, or any other length and shape), they are also considered one coil. As long as they are arranged in different metal layers, different regions of the same metal layer, or different levels of the same region, they are divided into different coils.

[0067] In at least one embodiment, the coil of the third winding coupled to the first winding, the coil of the fourth winding coupled to the first winding, and the first winding form a first coupling region; the coil of the third winding coupled to the second winding, the coil of the fourth winding coupled to the second winding, and the second winding form a second coupling region; or the first winding, the second winding, the third winding, and the fourth winding are mutually coupled to form a first coupling region. It should be noted that this embodiment does not specifically limit the number of coupling regions formed by the mutual coupling of the first winding, the second winding, the third winding, and the fourth winding.

[0068] In at least one embodiment, the sum of the number of coils in the third winding coupled to the first winding and the number of coils in the fourth winding coupled to the first winding is n, and the sum of the number of coils in the third winding coupled to the second winding and the number of coils in the fourth winding coupled to the second winding is n. It is understood that the sum of the number of coils in the third winding coupled to the first winding and the number of coils in the fourth winding coupled to the first winding is the same as the sum of the number of coils in the third winding coupled to the second winding and the number of coils in the fourth winding coupled to the second winding.

[0069] As an example, the third winding 303 includes a coil m1, a coil m2 and a coil m 3， The fourth winding 304 includes a coil k1, a coil k2 and a coil k 3,The first winding 301 may be coupled to the coil m1 and the coil m2 in the third winding 303, and to the coil k3 in the fourth winding 304; the second winding 302 may be coupled to the coil m3 in the third winding 303, and to the coil k1 and the coil k2 in the fourth winding 304. Alternatively, the first winding 301 may be coupled to the coil m1 and the coil m3 in the third winding 303, and to the coil k2 in the fourth winding 304; the second winding 302 may be coupled to the coil m2 in the third winding 303, and to the coil k1 and the coil k3 in the fourth winding 304.

[0070] It should be noted that this embodiment does not make specific restrictions on the specific serial numbers of the coils in the third winding coupled with the first winding and the specific serial numbers of the coils in the fourth winding coupled with the first winding, as well as the specific serial numbers of the coils in the third winding coupled with the second winding and the specific serial numbers of the coils in the fourth winding coupled with the second winding. It is only necessary to satisfy that the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

[0071] In this embodiment, the radio frequency power amplifier includes a first power amplification unit, a second power amplification unit and a signal synthesis network, wherein the signal synthesis network includes a first winding, a second winding, a third winding and a fourth winding; the first power amplification unit is connected to the first winding, and the second power amplification unit is connected to the second winding; the first end of the third winding and the first end of the fourth winding are connected to the ground terminal, and the second end of the third winding and the second end of the fourth winding are connected to the signal transmission terminal; the third winding includes n coils M={m1,m2,m3,...,m n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected to the ground terminal, and the nth coil m n One end of the fourth winding is connected to the signal transmission end; the fourth winding includes n coils K={k1, k2, k3, ..., k n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected to the ground terminal, and the nth coil k nOne end of the signal transmission end is connected to the signal transmission end; the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n; the signal synthesis network in this embodiment includes a first winding and a second winding connected to the power amplification unit, and a third winding and a fourth winding connected in parallel. By making the sum of the number of coils in the third winding and the fourth winding coupled with the first winding the same as the sum of the number of coils in the third winding and the fourth winding coupled with the second winding, the balance of the signal synthesis network in the RF power amplifier can be improved, thereby improving the impedance / phase imbalance between the first power amplification unit and the second power amplification unit, thereby solving the problem of excessive loss of the RF power amplifier, and thereby improving the power synthesis efficiency of the RF power amplifier.

[0072] Referring to FIG9 below, the horizontal axis represents the operating frequency, and the vertical axis represents the imaginary impedance, wherein 1-2 in FIG9 is the imaginary impedance curve of the first power amplifier unit and the second power amplifier unit in the prior art. a is the imaginary impedance curve of the first power amplifier circuit, and b is the imaginary impedance curve of the second power amplifier circuit. As shown in 1-2, the imaginary impedance of the first power amplifier circuit and the imaginary impedance of the second power amplifier circuit are different within a wide frequency band. Among them, 1-1 in FIG9 is the imaginary impedance curve of the first power amplifier unit and the second power amplifier unit in the improved present application. As shown in 1-1, the imaginary impedance of the first power amplifier circuit and the imaginary impedance of the second power amplifier circuit overlap within a wide frequency band, and the imaginary impedance of the first power amplifier unit and the imaginary impedance of the second power amplifier unit are the same within a wide frequency band, achieving impedance balance between the first power amplifier unit and the second power amplifier unit, thereby improving the balance of the RF power amplifier.

[0073] Referring to FIG10 below, the horizontal axis is the operating frequency, and the vertical axis is the real impedance, wherein 2-2 in FIG10 is the real impedance curve of the first power amplifier unit and the second power amplifier unit in the prior art. a is the real impedance curve of the first power amplifier circuit, and b is the real impedance curve of the second power amplifier circuit. It can be seen from 2-2 that the real impedance of the first power amplifier circuit and the real impedance of the second power amplifier circuit are different within a wide frequency band. Among them, 2-1 in FIG10 is the real impedance curve of the first power amplifier unit and the second power amplifier unit in the improved present application. It can be seen from 2-1 that the real impedance of the first power amplifier circuit and the real impedance of the second power amplifier circuit overlap within a wide frequency band, and the real impedance of the first power amplifier unit and the real impedance of the second power amplifier unit are the same within a wide frequency band, achieving impedance balance between the first power amplifier unit and the second power amplifier unit, thereby improving the balance of the RF power amplifier.

[0074] Referring to Figure 11 below, the horizontal axis is the operating frequency and the vertical axis is the power synthesis efficiency, where b is the curve of the RF power amplifier in the prior art, and a is the curve of the RF power amplifier in this application. As shown in Figure 11, this application improves the balance of the RF power amplifier by improving the signal synthesis network, and its power synthesis efficiency is significantly higher than the power synthesis efficiency of the RF power amplifier in the prior art.

[0075] In a specific embodiment, referring to Figures 6-8 below, the power amplification circuit includes a first power amplification unit 10 and a second power amplification unit 20, the first power amplification unit 10 is connected to the first winding 301, and the second power amplification unit 20 is connected to the second winding 302; the coil 303 in the third winding coupled with the first winding 301, the coil in the fourth winding 304 coupled with the first winding 301, and the first winding 301 form a first coupling region; the coil in the third winding 303 coupled with the second winding 302, the coil in the fourth winding 304 coupled with the second winding 302, and the second winding 302 form a second coupling region; wherein the first coupling region and the second coupling region are adjacent and non-overlapping regions.

[0076] The first power amplifying unit 10 may include one power amplifying transistor or two power amplifying transistors. Similarly, the second power amplifying unit 20 may include one power amplifying transistor or two power amplifying transistors. For example, when the first power amplifying unit 10 includes one power amplifying transistor and the second power amplifying unit 20 includes one power amplifying transistor, the first power amplifying unit 10 and the second power amplifying unit 20 may form a differential amplifying circuit, a dual single-ended combining amplifying circuit, or a Doherty amplifying circuit. When the first power amplifying unit 10 includes two power amplifying transistors and the second power amplifying unit 20 includes two power amplifying transistors, the first power amplifying unit 10 and the second power amplifying unit 20 may form a dual differential amplifying circuit.

[0077] In at least one embodiment, the first coupling region and the second coupling region are located in different regions and are arranged adjacent to each other, that is, the first coupling region and the second coupling region are arranged separately and adjacent to each other. The first winding and the second winding are located in different regions of the same metal layer, that is, the first winding and the second winding are two separate coils. The coil 303 of the third winding coupled with the first winding 301, the coil of the fourth winding 304 coupled with the first winding 301, and the first winding 301 are coupled to each other to form a first coupling region, and the first coupling region includes a first coupling center. The coil of the third winding 303 coupled with the second winding 302, the coil of the fourth winding 304 coupled with the second winding 302, and the second winding 302 are coupled to each other to form a second coupling region, and the second coupling region includes a second coupling center. It can be understood that the coils located in the same coupling region are coupled to each other.

[0078] In this embodiment, the power amplification circuit includes a first power amplification unit and a second power amplification unit, the first power amplification unit is connected to the first winding, and the second power amplification unit is connected to the second winding; the coil in the third winding coupled to the first winding, the coil in the fourth winding coupled to the first winding, and the first winding form a first coupling region; the coil in the third winding coupled to the second winding, the coil in the fourth winding coupled to the second winding, and the second winding form a second coupling region; wherein the first coupling region and the second coupling region are adjacent and non-overlapping regions. In this embodiment, the first winding, the second winding, the third winding, and the fourth winding are coupled to each other to form adjacent and non-overlapping first coupling regions and second coupling regions, thereby making the circuit layout of the signal synthesis network more flexible while improving the balance of the signal synthesis network.

[0079] In a specific embodiment, the coil m1 in the third winding is coupled to the first winding, and the coil m in the third winding is coupled to the first winding. n The coil k1 in the fourth winding is coupled with the second winding, and the coil k in the fourth winding is coupled with the second winding. n coupled to the first winding.

[0080] Alternatively, the coil m1 in the third winding is coupled to the second winding, and the coil m in the third winding is coupled to the second winding. n The coil k1 in the fourth winding is coupled to the first winding, and the coil k in the fourth winding is coupled to the first winding. n coupled with the second winding.

[0081] The coil in the third winding closest to the ground terminal is a section of the third winding directly connected to the ground terminal. For example, coil m1 is shown in Figures 6-8. The coil in the third winding closest to the signal transmission terminal is a section of the third winding directly connected to the signal transmission terminal. For example, coil m2 is shown in Figure 6, m3 is shown in Figure 7, and m4 is shown in Figure 8.

[0082] Similarly, the coil in the fourth winding closest to the ground terminal is a section of the coil in the fourth winding directly connected to the ground terminal. For example, coil k1 is shown in Figures 6-8. The coil in the fourth winding closest to the signal transmission terminal is a section of the coil in the fourth winding directly connected to the signal transmission terminal. For example, k2 is shown in Figure 6, k3 is shown in Figure 7, and k4 is shown in Figure 8.

[0083] In at least one embodiment, in order to improve the balance problem of the signal synthesis network in the radio frequency power amplifier, the coil m1 in the third winding is coupled to the first winding, and the coil m2 in the third winding is connected to the first winding. n The coil k1 in the fourth winding is coupled with the second winding, and the coil k in the fourth winding is coupled with the second winding. n Alternatively, the coil m1 in the third winding is coupled to the second winding, and the coil m in the third winding is coupled to the second winding. n The coil k1 in the fourth winding is coupled to the first winding, and the coil k in the fourth winding is coupled to the first winding. n Coupled with the second winding, so that the coil m in the third winding n The coil k1 in the fourth winding is coupled to the second winding, and the coil m1 in the third winding and the coil k in the fourth winding are coupled to the second winding. nCoupled with the first winding; so that the winding method of the coil in the third winding is opposite to the winding method of the coil in the fourth winding, by improving the balance of the signal synthesis network in the RF power amplifier, the impedance / phase imbalance between the first power amplification unit and the second power amplification unit can be improved, thereby solving the problem of excessive loss of the RF power amplifier and improving the power synthesis efficiency of the RF power amplifier.

[0084] As an example, assuming the coil coupled to the first winding is labeled A and the coil coupled to the second winding is labeled B, then the labeling of coil M in the third winding and coil K in the fourth winding is (AxxB, BxxA) or (BxxA, AxxB). It should be noted that this embodiment does not limit the number of intermediate coils xx or the specific winding method. It is only necessary to ensure that the coils connected to the ground terminal and the coils connected to the signal transmission terminal in the third winding and the fourth winding are wound in opposite directions.

[0085] In a specific embodiment, the grounding end of the third winding is arranged at the inner periphery of the first coupling region, the signal transmission end of the third winding is arranged at the outer periphery of the second coupling region, the grounding end of the fourth winding is arranged at the inner periphery of the second coupling region, and the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region;

[0086] Alternatively, the grounding end of the third winding is arranged on the inner periphery of the second coupling region, the signal transmission end of the third winding is arranged on the outer periphery of the first coupling region, the grounding end of the fourth winding is arranged on the inner periphery of the first coupling region, and the signal transmission end of the third winding is arranged on the outer periphery of the second coupling region.

[0087] In at least one embodiment, since the coil connected to the ground end can be directly grounded or grounded through a capacitor, the coil connected to the signal transmission end needs to be connected to the external circuit 40. Therefore, this embodiment arranges the end connected to the ground end on the inner periphery of the first coupling area or the second coupling area, and the end connected to the signal transmission end on the outer periphery of the first coupling area or the second coupling area. This not only reduces the loss caused by the jumper when the signal transmission end is connected to the external device or circuit, but also utilizes the empty area between the first coupling area and the second coupling area to improve space utilization, thereby making the layout of the signal synthesis network more compact.

[0088] In a specific embodiment, with the signal transmission end of the third winding 303 as the starting point, the coil in the third winding 303 coupled with the first winding 301 is wound along a first direction, and the coil in the third winding 303 coupled with the second winding 302 is wound along a second direction.

[0089] Taking the signal transmission end of the fourth winding 304 as a starting point, the coil in the fourth winding 304 coupled with the second winding 302 is wound along the second direction, and the coil in the fourth winding 304 coupled with the first winding 301 is wound along the first direction.

[0090] The first direction is clockwise and the second direction is counterclockwise, or the first direction is counterclockwise and the second direction is clockwise.

[0091] In at least one embodiment, a portion of the coils in the third winding 303 are coupled to the first winding, and another portion of the coils are coupled to the second winding. By making the winding direction of the coils in the third winding coupled to the first winding and the winding direction of the coils in the third winding coupled to the second winding opposite, the jumpers when connecting the coils in the third winding 303 coupled to the first winding and the coils in the third winding 303 coupled to the second winding can be reduced, and the coil winding method of the third winding 303 can be more flexible and simple.

[0092] In at least one embodiment, a portion of the coils in the fourth winding 304 are coupled to the first winding, and another portion of the coils are coupled to the second winding. By making the winding direction of the coils in the fourth winding 304 coupled to the first winding and the winding direction of the coils in the fourth winding 304 coupled to the second winding opposite, the jumper wires when connecting the coils in the fourth winding 304 coupled to the first winding and the coils in the fourth winding 304 coupled to the second winding can be reduced, and the coil winding method of the fourth winding 304 can be made more flexible and simple.

[0093] In at least one embodiment, since the first winding and the second winding are respectively wound in different areas of the same metal layer, that is, respectively wound in the first coupling area and the second coupling area, the coil in the third winding connected to the ground end and the coil in the fourth winding connected to the signal transmission end are coupled to the second winding, and the coil in the third winding connected to the signal transmission end and the coil in the fourth winding connected to the ground end are coupled to the first winding, or the coil in the third winding connected to the ground end and the coil in the fourth winding connected to the signal transmission end are coupled to the first winding, and the coil in the third winding connected to the signal transmission end and the coil in the fourth winding connected to the ground end are coupled to the second winding, and through By taking the signal transmission end of the third winding as the starting point, and making the winding direction of the coil in the third winding coupled with the first winding and the winding direction of the coil in the third winding coupled with the second winding opposite, and taking the signal transmission end of the fourth winding as the starting point, and making the winding direction of the coil in the fourth winding coupled with the first winding and the winding direction of the coil in the fourth winding coupled with the second winding opposite, the coil of the third winding and the coil of the fourth winding are respectively coupled with the first winding and the second winding in a reverse complementary winding manner, thereby further optimizing the balance of the signal synthesis network in the RF power amplifier to reduce the overall loss of the RF power amplifier.

[0094] In a specific embodiment, the third winding and the fourth winding are respectively arranged in different metal layers, or the third winding and the fourth winding are both arranged in the same metal layer.

[0095] In at least one embodiment, the third winding and the fourth winding are disposed on different metal layers. For example, the n coils M of the third winding are disposed on a first metal layer, and the n coils K of the fourth winding are disposed on a second metal layer. Placing the third winding and the fourth winding on different metal layers can reduce wire jumps and thereby reduce losses.

[0096] In at least one embodiment, the third winding and the fourth winding are both arranged on the same metal layer. For example, the n coils M of the third winding and the n coils K of the fourth winding are both arranged on the first metal layer. By arranging the third winding and the fourth winding on the same metal layer, not only can the third winding and the fourth winding be connected to the ground terminal at the same distance from the ground terminal, thereby ensuring balance, but the layout of the signal synthesis network can also be made more compact, and can be implemented using only 2L metal plates, thereby achieving low cost.

[0097] In a specific embodiment, some of the n coils M of the third winding are arranged in one metal layer, and another part of the coils are arranged in another metal layer, and / or, some of the n coils K of the fourth winding are arranged in one metal layer, and another part of the coils are arranged in another metal layer. For example, half of the n coils M of the third winding are arranged in the first metal layer, and half of the coils are arranged in the second metal layer, and / or, half of the n coils K of the fourth winding are arranged in the first metal layer, and half of the coils are arranged in the second metal layer. This can improve the problem of different distances from the third winding and the fourth winding to the ground terminal when they are in different layers, thereby reducing jumpers and thus reducing losses while further improving balance.

[0098] In a specific embodiment, the first winding 301 and the second winding 302 are arranged in the second metal layer, the third winding 303 is arranged in the first metal layer, and the fourth winding 304 is arranged in the first metal layer. The third winding 303 at least partially overlaps with the projection of the first winding 301 and the second winding 302 in the vertical direction, and the fourth winding 304 at least partially overlaps with the projection of the first winding 301 and the second winding 302 in the vertical direction.

[0099] In at least one embodiment, the larger the vertical overlap area of ​​the third winding 303 and the first winding 301 and the second winding 302, the better the coupling coefficient between the third winding 303 and the first winding 301 and the second winding 302. The larger the vertical overlap area of ​​the fourth winding 304 and the first winding 301 and the second winding 302, the better the coupling coefficient between the fourth winding 304 and the first winding 301 and the second winding 302. It can be understood that the coupling coefficient of the signal synthesis network is optimal when the vertical projections of the third winding 303 and the first winding 301 and the second winding 302 completely overlap, and the vertical projections of the fourth winding 304 completely overlap, and the first winding 301 and the second winding 302 completely overlap.

[0100] In at least one embodiment, the third winding is arranged in a metal layer adjacent to and vertically above the metal layer where the first winding 301 and the second winding 302 are located, and the third winding is coupled up and down with the first winding 301 and the second winding 302; the fourth winding is arranged in a metal layer adjacent to and vertically below the metal layer where the first winding 301 and the second winding 302 are located, and the fourth winding is coupled up and down with the first winding 301 and the second winding 302. This not only greatly improves the coupling coefficient of the signal synthesis network to improve the balance of the signal synthesis network, but also reduces losses while ensuring a small occupied area, thereby improving the bandwidth, linearity and efficiency of the RF power amplifier.

[0101] In a specific embodiment, the first winding includes a first primary coil and a second primary coil; the second winding includes a third primary coil and a fourth primary coil; the first primary coil, the third primary coil and the third winding are arranged on the same metal layer, and the third winding is coupled to the first primary coil and the third primary coil on the same layer; the second primary coil, the fourth primary coil and the fourth winding are arranged on the same metal layer, and the fourth winding is coupled to the second primary coil and the fourth primary coil on the same layer.

[0102] In at least one embodiment, the third winding and the fourth winding are respectively arranged in different metal layers and connected in parallel, and the third winding is coupled with some of the coils in the first winding and some of the coils in the second winding, and the fourth winding is coupled with some of the coils in the first winding and some of the coils in the second winding. Therefore, by making the first winding include a first primary coil and a second primary coil; the second winding include a third primary coil and a fourth primary coil; and making the first primary coil, the third primary coil, and the third winding arranged in the same metal layer, the third winding is coupled with the first and third primary coils on the same layer, and the second primary coil, the fourth primary coil, and the fourth winding are arranged in the same metal layer, and the fourth winding is coupled with the second and fourth primary coils on the same layer, thereby achieving the side coupling of the third winding with some of the coils in the first winding and some of the coils in the second winding, and the side coupling of the fourth winding with some of the coils in the first winding and some of the coils in the second winding on the same layer.

[0103] In at least one embodiment, the first primary coil and the second primary coil in the first winding can be connected in parallel, and the third primary coil and the fourth primary coil in the second winding can be connected in parallel. Alternatively, the first primary coil and the second primary coil in the first winding can be connected in series, and the third primary coil and the fourth primary coil in the second winding can be connected in series. The first primary coil and the second primary coil arranged in different metal layers can be connected by metal through-holes, and the third primary coil and the fourth primary coil arranged in different metal layers can be connected by metal through-holes. Under the premise that the inductance of the fourth winding of the third winding remains unchanged, the first primary coil and the second primary coil are connected in parallel, and the third primary coil and the fourth primary coil in the second winding are connected in parallel, the number of turns of the signal synthesis network is relatively large, and the impedance conversion that can be achieved is relatively large; the first primary coil and the second primary coil are connected in series, and the third primary coil and the fourth primary coil in the second winding are connected in series, the number of turns of the signal synthesis network is relatively small, and the impedance conversion that can be achieved is relatively small.

[0104] In a specific embodiment, the set M of the third winding coupled with the first winding 11 ={m a1 ,m a2 ,m a3 ,...,m an} in the coil number {a1,a2,a3...a n} and the set K of the fourth winding coupled with the second winding 21 ={k a1 ,k a2 ,k a3 ,...,k an} in the coil number {a1,a2,a3...a n}same.

[0105] A set M of the third winding coupled with the second winding 21 ={m b1 ,m b2 ,m b3 ,...,m bn} in the coil number {b1,b2,b3...b n} and the set K of the fourth winding coupled with the first winding 11 ={k b1 ,k b2 ,k b3 ,...,k bn} in the coil number {b1,b2,b3...b n}same.

[0106] In at least one embodiment, if the set M of the third winding coupled to the first winding 11 ={m1,m3,m5,...,m n-1} is numbered {1,3,5...n-1}, and the set M of the third winding coupled with the second winding 21 ={m2,m4,m6,...,m n}, then the set K of the fourth winding coupled with the second winding is 21 ={k1,k3,k5,...,k n-1} is numbered {1,3,5...n-1}; the set K of the fourth winding coupled with the first winding 11 ={k2,k4,k6,...,k n}The coil numbers in are {2,4,6...n}.

[0107] In another embodiment, if the set M of the third winding coupled to the first winding 11 ={m1,m4,m5,...,m n-2 ,m n-1} is numbered {1, 4, 5...n-2, n-1}, and the set M of the third winding coupled with the second winding 21 ={m2,m3,m6,m7...m n-3 ,m n}, then the set K of the fourth winding coupled with the second winding is 21 ={k1,k4,k5,...,k n-2 ,k n-1} is numbered {1, 4, 5...n-2, n-1}; the set K of the fourth winding coupled with the first winding 11 ={k2,k3,k6,k7...,k n-3 , k n The coil numbers in} are {2,4,6,7...n-3,n}.

[0108] It should be noted that the above two embodiments are merely exemplary descriptions. This application only needs to ensure that the coil number in the set of the third winding coupled with the first winding is the same as the coil number in the set of the fourth winding coupled with the second winding, and the coil number in the set of the third winding coupled with the second winding is the same as the coil number in the set of the fourth winding coupled with the first winding; thereby achieving the coupling of the coils of the third winding and the fourth winding with the first winding and the second winding respectively in a reverse complementary winding manner, thereby further optimizing the balance of the signal synthesis network in the RF power amplifier and improving the power synthesis efficiency of the RF power amplifier.

[0109] In a specific embodiment, the first winding is coupled to the odd-numbered coils in the third winding; the second winding is coupled to the even-numbered coils in the third winding; the first winding is coupled to the even-numbered coils in the fourth winding; the second winding is coupled to the odd-numbered coils in the fourth winding;

[0110] Alternatively, the first winding is coupled to the even-numbered coils in the third winding; the second winding is coupled to the odd-numbered coils in the third winding; the first winding is coupled to the odd-numbered coils in the fourth winding; and the second winding is coupled to the even-numbered coils in the fourth winding.

[0111] In at least one embodiment, the set M of the third winding coupled to the first winding 11 ={m1,m3,m5,...,m n-1} is numbered {1,3,5...n-1}, and the set M of the third winding coupled with the second winding 21 ={m2,m4,m6,...,m n}, then the set K of the fourth winding coupled with the second winding is 21 ={k1,k3,k5,...,k n-1} is numbered {1,3,5...n-1}; the set K of the fourth winding coupled with the first winding 11 ={k2,k4,k6,...,k n} is {2, 4, 6...n}. Alternatively, the set M of the third winding coupled with the second winding is 11 ={m1,m3,m5,...,m n-1} is numbered {1,3,5...n-1}, and the set M of the third winding coupled with the first winding 21 ={m2,m4,m6,...,m n}, then the set K of the fourth winding coupled with the first winding is 21 ={k1,k3,k5,...,k n-1} is numbered {1, 3, 5...n-1}; the set K of the fourth winding coupled with the second winding 11 ={k2,k4,k6,...,k n}The coil numbers in are {2,4,6...n}.

[0112] In this embodiment, by coupling the first winding with the odd-numbered coils in the third winding; coupling the second winding with the even-numbered coils in the third winding, and coupling the first winding with the even-numbered coils in the fourth winding; and coupling the second winding with the odd-numbered coils in the fourth winding; or, coupling the first winding with the even-numbered coils in the third winding; coupling the second winding with the odd-numbered coils in the third winding, and coupling the first winding with the odd-numbered coils in the fourth winding; and coupling the second winding with the even-numbered coils in the fourth winding; the coils of the third winding and the coils of the fourth winding are respectively coupled to the first winding and the second winding in a reverse complementary winding manner, that is, by optimizing the balance of the signal synthesis network in the RF power amplifier, the impedance / phase imbalance between the first power amplification unit and the second power amplification unit can be improved, thereby improving the power synthesis efficiency of the RF power amplifier.

[0113] In a specific embodiment, the coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m4,m5,m8,m9,...m n-2 ,m n-1}, where the coil set M 11 The serial number of the coil at the odd position is plus 3 to be the next coil, and the serial number of the coil at the even position is plus 1 to be the next coil.

[0114] The coil set M in the second winding and the third winding 21 Coupling, M 21 ={m2,m3,m6,m7,m 10 ,...m m-3 ,m n}, where the coil set M 21 The serial number of the coil at the even position is increased by 1 to be the next coil; and the serial number of the coil at the odd position is increased by 3 to be the next coil.

[0115] The coil set K in the first winding and the fourth winding 11Coupling, K 11 ={k2,k3,k6,k7,k 10 ,...k m-3 ,k n}, where the coil set K 11 The serial number of the coil at the even position is increased by 1 to be the next coil; and the serial number of the coil at the odd position is increased by 3 to be the next coil.

[0116] The coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k4,k5,k8,k9,...k n-2 ,k n-1}, where the coil set K 21 The serial number of the coil at the odd position is plus 3 to be the next coil, and the serial number of the coil at the even position is plus 1 to be the next coil.

[0117] As an example, in order to satisfy the requirement that the coil numbers in the set of the third winding coupled with the first winding are the same as the coil numbers in the set of the fourth winding coupled with the second winding, the first winding and the first coil m1, the fourth coil m4, the fifth coil m5, ..., the N-2th coil m n-2 and the N-1th coil m n-1 Coupling, and so on, satisfying the coil set M 11 The serial number of the coil at the odd position is added by 3 to get the next coil, and the serial number of the coil at the even position is added by 1 to get the next coil. For example: the first coil m1 at the odd position is added by 3 to get the next coil, which is the fourth coil m4, and the fourth coil m4 at the even position is added by 1 to get the next coil, which is the fifth coil m5. Since the fifth coil m5 is the coil at the odd position, the next coil of the fifth coil m5 is the eighth coil m8 with the number of coils added by 3. The eighth coil m8 is the coil at the even position, so the next coil of the eighth coil m8 is the ninth coil m9 with the number of coils added by 1, and so on. Similarly, the first coil k1, the fourth coil k4, the fifth coil k5, ..., the N-2th coil k n-2 and coil k n-1 Coupling, and so on, satisfy the coil set K 21For odd-numbered coils, add 3 to the number of the next coil, and for even-numbered coils, add 1 to the number of the next coil. For example, if you add 3 to the first coil k1 in an odd position, the next coil is the fourth coil k4. If you add 1 to the fourth coil k4 in an even position, the next coil is the fifth coil k5. Since the fifth coil k5 is in an odd position, the next coil after k5 is the eighth coil k8, which has three more coils. Since k8 is in an even position, the next coil after k8 is the ninth coil k9, which has one more coil. And so on.

[0118] As an example, in order to satisfy the requirement that the coil number in the set coupled with the second winding in the third winding is the same as the coil number in the set coupled with the first winding in the fourth winding, the second winding and the second coil m2, the third coil m3, the sixth coil m6, the seventh coil m7..., the n-3th coil m n-3 and the nth coil m n Coupling. And so on, the coil set M 21 The next coil is simply the number of the coil at an odd position plus 3, and the next coil is the number of the coil at an even position plus 1. For example, the next coil m3 is the third coil m3 when the second coil m2 is at an even position, and the next coil m6 is the sixth coil m6 when the third coil m3 is at an odd position. Since the sixth coil m6 is at an even position, the next coil is the seventh coil m7 with the number of coils plus 1. Since the seventh coil m7 is at an odd position, the next coil is the tenth coil m7 with the number of coils plus 3. 10 , and so on. Similarly, the second coil k2, the third coil k3, the sixth coil k6, the seventh coil k7, ..., the n-3th coil k n-3 and the nth coil k n Coupling. And so on, the coil set K 11 The next coil is simply the number of the coil at an odd position plus 3, and the next coil is the number of the coil at an even position plus 1. For example, the next coil k3 is the third coil k3 when the second coil k2 is at an even position, and the next coil k6 is the sixth coil k6 when the third coil k3 is at an odd position. Since the sixth coil k6 is at an even position, the next coil is the seventh coil k7, which has the same number of coils plus 1. Since the seventh coil k7 is at an odd position, the next coil is the tenth coil k7, which has the same number of coils plus 3. 10 , and so on.

[0119] In a specific embodiment, the coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m2,m5,m6,m9,...m n-1 ,m n}, where the coil set M 31 The serial number of the coil at the odd position is increased by 1 to become the next coil, and the serial number of the coil at the even position is increased by 3 to become the next coil.

[0120] The coil set M in the second winding and the third winding 21 Coupling, M 21 ={m3,m4,m7,m8,m 11 ,...m m-3 ,m m-2}, where the coil set M 21 The serial number of the coil at the odd position is added by 1 to obtain the next coil; and the serial number of the coil at the even position is added by 3 to obtain the next coil.

[0121] The coil set k in the first winding and the fourth winding 11 Coupling, k 11 ={k3,k4,k7,k8,k 11 ,...k n-3 ,k n-2}, where the coil set k 11 The serial number of the coil at the odd position is added by 1 to obtain the next coil; and the serial number of the coil at the even position is added by 3 to obtain the next coil.

[0122] The coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k2,k5,k6,k9,...k n-1 ,k n}, where the coil set K 21 The serial number of the coil at the odd position is increased by 1 to become the next coil, and the serial number of the coil at the even position is increased by 3 to become the next coil.

[0123] As an example, in order to satisfy the requirement that the coil number in the set of the third winding coupled with the first winding is the same as the coil number in the set of the fourth winding coupled with the second winding, the coil set M in the first winding and the third winding are connected. 11 Coupling, M 11 ={m1,m2,m5,m6,m9,...m n-1 ,m n}, where the coil set M31 The serial number of the coil at the odd position is incremented by 1 to become the next coil, and the serial number of the coil at the even position is incremented by 3 to become the next coil. For example, the first coil m1 at the odd position is incremented by 1 to obtain the next coil, which is the second coil m2. The second coil m2 at the even position is incremented by 3 to obtain the next coil, which is the fifth coil m5. Since the fifth coil m5 is the coil at the odd position, the next coil after the fifth coil m5 is the sixth coil m6, which is incremented by 1. Since the sixth coil m6 is the coil at the even position, the next coil after the sixth coil m6 is the ninth coil m9, which is incremented by 3. Similarly, the coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k2,k5,k6,k9,...k n-1 ,k n}, where the coil set K 21 The next coil in an odd-numbered position is incremented by 1, and the next coil in an even-numbered position is incremented by 3. For example, if you increment 1 from the first coil k1 in an odd-numbered position, the next coil is the second coil k2. If you increment 3 from the second coil k2 in an even-numbered position, the next coil is the fifth coil k5. Since the fifth coil k5 is in an odd-numbered position, the next coil after k5 is the sixth coil k6, which is incremented by 1. Since the sixth coil k6 is in an even-numbered position, the next coil after k6 is the ninth coil k9, which is incremented by 3.

[0124] As an example, in order to satisfy the requirement that the coil number in the set of the third winding coupled with the second winding is the same as the coil number in the set of the fourth winding coupled with the first winding, the coil set M in the second winding and the third winding are 21 Coupling, M 21 ={m3,m4,m7,m8,m 11 ,...m m-3 ,m m-2}, where the coil set M 21 The serial number of the coil at the odd position is incremented by 1 to become the next coil; and the serial number of the coil at the even position is incremented by 3 to become the next coil. For example, the third coil m3 at the odd position is incremented by 1 to become the next coil m4, and the fourth coil m4 at the even position is incremented by 3 to become the next coil m7. Since the seventh coil m7 is the coil at the odd position, the next coil of the seventh coil m7 is the eighth coil m8, which is incremented by 1. Since the eighth coil m8 is the coil at the even position, the next coil of the eighth coil m8 is the eleventh coil m8, which is incremented by 3. 11Similarly, the coil set K in the first winding and the fourth winding 11 Coupling, K 11 ={k3,k4,k7,k8,k 11 ,...k n-3 ,k n-2}, where the coil set K 11 The serial number of the coil at the odd position is incremented by 1 to obtain the next coil; and the serial number of the coil at the even position is incremented by 3 to obtain the next coil; for example, the serial number of the third coil k3 at the odd position is incremented by 1 to obtain the next coil, which is the fourth coil k4; the serial number of the fourth coil k4 at the even position is incremented by 3 to obtain the next coil, which is the seventh coil k7. Since the seventh coil k7 is the coil at the odd position, the next coil of the seventh coil k7 is the eighth coil k8, which is incremented by 1; the eighth coil k8 is the coil at the even position, so the next coil of the eighth coil k8 is the eleventh coil k8, which is incremented by 3. 11 .

[0125] In a specific embodiment, the n coils M of the third winding are arranged in the same metal layer, and are divided into different coils in different metal layers, are divided into different coils in different areas of the same metal layer, and are divided into different coils in different levels of the same area;

[0126] The n coils N of the third winding are arranged in the same metal layer, and are divided into different coils in different metal layers, are divided into different coils in different areas of the same metal layer, and are divided into different coils at different levels in the same area.

[0127] In at least one embodiment, the n coils connected in series between the ground terminal and the signal transmission terminal can be divided as follows:

[0128] If n coils M are arranged in the same metal layer, then the coils arranged in different areas are divided into different coils, and the coils arranged in different layers (for example, inner layer, middle layer, outer layer, etc.) in the same area are divided into different coils. Taking Figure 6 as an example, assuming that the third winding 303 in Figure 6 is arranged in the same metal layer, the third winding 303 in Figure 5 is divided into 4 coils. Among them, coil m1 and coil m2 are arranged in the same area in the same metal layer, and coil m3 and coil m4 are arranged in the same area in the same metal layer. Coil m1 and coil m2 are in different areas of the same metal layer from coil m3 and coil m4. Coils m1 and m2 are arranged at different layers (coil m1 is arranged in the inner layer relative to coil m2), and coils m3 and m4 are arranged at different layers (coil m3 is arranged in the inner layer relative to coil m4).

[0129] Similarly, if n coils K are arranged in the same metal layer, then those arranged in different areas are divided into different coils, and those arranged in different layers (for example, inner layer, middle layer, outer layer, etc.) in the same area are divided into different coils. Taking Figure 6 as an example, assuming that the third winding 303 in Figure 6 is arranged in the same metal layer, the fourth winding 304 in Figure 5 is divided into 4 coils. Among them, coil k1 and coil k2 are arranged in the same area in the same metal layer, and coil k3 and coil k4 are arranged in the same area in the same metal layer. Coil k1 and coil K2 are in different areas of the same metal layer than coil k3 and coil k4. Coil k1 and k2 are arranged at different layers (coil k1 is arranged in the inner layer relative to coil k2), and coil k3 and k4 are arranged at different layers (coil k3 is arranged in the inner layer relative to coil k4).

[0130] In a specific embodiment, the first power amplifying unit includes a first amplifying transistor, and the second power amplifying unit includes a second amplifying transistor; the input end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the input end of the second amplifying transistor is connected to the second end of the second winding; or, the output end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the output end of the second amplifying transistor is connected to the second end of the second winding.

[0131] In this embodiment, both the first power amplification unit and the second power amplification circuit are single-ended amplifier circuits. When the signal synthesis network is an input-side signal synthesis network, the input end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the input end of the second amplifying transistor is connected to the second end of the second winding. The signal synthesis network converts the RF input signal into a first RF signal and a second RF signal, which are respectively input into the first amplifying transistor and the second amplifying transistor for amplification. When the signal synthesis network is an output-side signal synthesis network, the output end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the output end of the second amplifying transistor is connected to the second end of the second winding. The signal synthesis network converts and synthesizes the first and second RF amplified signals, which have been amplified in the first and second amplifying transistors, and then outputs them. The phase of the first RF amplified signal output by the first amplifying transistor differs by 180 degrees from the phase of the second RF amplified signal output by the second amplifying transistor. In this case, the RF power amplifier is a differential power amplifier.

[0132] In a specific embodiment, the first power amplifying unit includes a first amplifying transistor, and the first power amplifying unit includes a second amplifying transistor; the input end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is grounded or the power supply end, the input end of the second amplifying transistor is connected to the first end of the second winding, and the second end of the second winding is grounded or the power supply end; or, the output end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is grounded or the power supply end, the output end of the second amplifying transistor is connected to the first end of the second winding, and the second end of the second winding is grounded or the power supply end.

[0133] In this embodiment, both the first power amplification unit and the second power amplification circuit are single-ended amplifier circuits. When the signal synthesis network is an input-side signal synthesis network, the input end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the input end of the second amplifying transistor is connected to the second end of the second winding. The signal synthesis network converts the RF input signal into a first RF signal and a second RF signal, which are respectively input into the first amplifying transistor and the second amplifying transistor for amplification. When the signal synthesis network is an output-side signal synthesis network, the output end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the output end of the second amplifying transistor is connected to the second end of the second winding. The signal synthesis network converts and synthesizes the first and second RF amplified signals, which have been amplified in the first and second amplifying transistors, and then outputs them. The phase of the first RF amplified signal output by the first amplifying transistor is the same as the phase of the second RF amplified signal output by the second amplifying transistor. In this case, the RF power amplifier is a dual single-ended combined power amplifier.

[0134] In a specific embodiment, the first power amplifying unit includes a first amplifying transistor and a third amplifying transistor, and the second power amplifying unit includes a second amplifying transistor and a fourth amplifying transistor;

[0135] The input terminal of the first amplifying transistor is connected to the first end of the first winding, the input terminal of the third amplifying transistor is connected to the second end of the first winding, the input terminal of the second amplifying transistor is connected to the second end of the second winding, and the input terminal of the fourth amplifying transistor is connected to the first end of the second winding; or, the output terminal of the first amplifying transistor is connected to the first end of the first winding, the output terminal of the third amplifying transistor is connected to the second end of the first winding, the output terminal of the second amplifying transistor is connected to the second end of the second winding, and the output terminal of the fourth amplifying transistor is connected to the first end of the second winding.

[0136] In this embodiment, the first power amplification unit and the second power amplification unit are both differential amplifier circuits. When the signal synthesis network is an input-end signal synthesis network, the input end of the first amplification transistor is connected to the first end of the first winding, the input end of the third amplification transistor is connected to the second end of the first winding, the input end of the second amplification transistor is connected to the second end of the second winding, and the input end of the fourth amplification transistor is connected to the first end of the second winding. When the signal synthesis network is an output-end signal synthesis network, the output end of the first amplification transistor is connected to the first end of the first winding, the output end of the third amplification transistor is connected to the second end of the first winding, the output end of the second amplification transistor is connected to the second end of the second winding, and the output end of the fourth amplification transistor is connected to the first end of the second winding.

[0137] In a specific embodiment, the first amplifying transistor 11 is a BJT tube, including a base, a collector and an emitter. The base of the first amplifying transistor 11 is the input terminal of the first amplifying transistor, the collector of the first amplifying transistor 11 is the output terminal of the first amplifying transistor, and the emitter of the first amplifying transistor is grounded; the second amplifying transistor is a BJT tube, including a base, a collector and an emitter. The base of the second amplifying transistor 12 is the input terminal of the second amplifying transistor 12, the collector of the second amplifying transistor is the output terminal of the second amplifying transistor, and the emitter of the second amplifying transistor 12 is grounded. Grounded; the third amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the third amplifying transistor 21 is the input end of the third amplifying transistor, the collector of the third amplifying transistor 21 is the output end of the third amplifying transistor, and the emitter of the third amplifying transistor 21 is grounded; the fourth amplifying transistor 22 is a BJT tube, including a base, a collector and an emitter, the base of the fourth amplifying transistor 22 is the input end of the fourth amplifying transistor, the collector of the fourth amplifying transistor 22 is the output end of the fourth amplifying transistor 22, and the emitter of the fourth amplifying transistor 22 is grounded.

[0138] Alternatively, in another specific embodiment, the first amplifying transistor 11 is a MOS transistor, including a gate, a source, and a drain, the gate of the first amplifying transistor 11 being the input terminal of the first amplifying transistor, the source of the first amplifying transistor 11 being the output terminal of the first amplifying transistor, and the drain of the first amplifying transistor 11 being grounded; the second amplifying transistor 12 is a MOS transistor, including a gate, a source, and a drain, the gate of the second amplifying transistor 12 being the input terminal of the second amplifying transistor 12, the source of the second amplifying transistor 12 being the output terminal of the second amplifying transistor, and the drain of the second amplifying transistor 12 being grounded;

[0139] The third amplifying transistor 21 is a MOS transistor, including a gate, a source and a drain. The gate of the third amplifying transistor 21 is the input end of the third amplifying transistor 21, the source of the third amplifying transistor 21 is the output end of the third amplifying transistor, and the drain of the third amplifying transistor is grounded. The fourth amplifying transistor 22 is a MOS transistor, including a gate, a source and a drain. The gate of the fourth amplifying transistor 22 is the input end of the fourth amplifying transistor, the source of the fourth amplifying transistor 22 is the output end of the fourth amplifying transistor, and the drain of the fourth amplifying transistor 22 is grounded.

[0140] In a specific embodiment, the first end of the third winding is connected to the ground end through a first capacitor, and the first end of the fourth winding is connected to the ground end through a second capacitor; the first capacitor is set in the first coupling region, and the second capacitor is set in the second coupling region, or the first capacitor is set outside the second coupling region, and the second capacitor is set outside the first coupling region.

[0141] The first capacitor and the second capacitor are matching capacitors in the RF power amplifier. Since the third winding and the fourth winding are connected in parallel, when the third winding and the fourth winding are connected to the ground terminal via capacitors, they can be connected to the corresponding first capacitor and second capacitor respectively before being connected to the ground terminal. The first capacitor can be set within the first coupling region or outside the first coupling region, and the second capacitor can be set within the second coupling region or outside the second coupling region.

[0142] In at least one embodiment, the first capacitor and the second capacitor may be chip capacitors or stacked capacitors. This embodiment does not limit the specific implementation of the first capacitor and the second capacitor.

[0143] In this embodiment, when the third winding and the fourth winding are connected to the ground terminal through capacitors, they are respectively connected to the corresponding first capacitor and second capacitor and then connected to the ground terminal, so that the positions of the first capacitor and the second capacitor can be set more flexibly, thereby improving the flexibility of the circuit.

[0144] In a specific embodiment, the first end of the third winding and the first end of the fourth winding are connected and then connected to the ground via a third capacitor, and the third capacitor is arranged outside the first coupling region and outside the second coupling region.

[0145] The third capacitor is a matching capacitor in the RF power amplifier. Since the third winding and the fourth winding are connected in parallel, when the third winding and the fourth winding are connected to the ground terminal via capacitors, they can be connected and then connected to the ground terminal via a third capacitor. The third capacitor is disposed outside the first coupling region and outside the second coupling region, thereby saving occupied area.

[0146] In at least one embodiment, the third capacitor may be a chip capacitor or a stacked capacitor. This embodiment does not limit the specific implementation of the third capacitor.

[0147] The present application also provides a radio frequency front-end module, comprising: a substrate and a first chip and a signal synthesis network arranged on the substrate, wherein the first chip comprises a first power amplifier unit and a second power amplifier unit; the signal synthesis network comprises a first winding, a second winding, a third winding and a fourth winding; the first power amplifier unit is connected to the first winding, and the second power amplifier unit is connected to the second winding; the first end of the third winding and the first end of the fourth winding are connected to the ground terminal, and the second end of the third winding and the second end of the fourth winding are connected to the signal transmission terminal; the third winding comprises n coils M={m1,m2,m3,...,m n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected to the ground terminal, and the nth coil m n One end of the fourth winding is connected to the signal transmission end; the fourth winding includes n coils K={k1, k2, k3, ..., k n}, n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected to the ground terminal, and the nth coil k none end of the third winding is connected to the signal transmission end; the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

[0148] In this embodiment, the signal synthesis network includes a first winding and a second winding connected to the power amplification unit, and a third winding and a fourth winding respectively arranged in different metal layers and connected in parallel. By making the sum of the number of coils coupled with the first winding in the third winding and the fourth winding the same as the sum of the number of coils coupled with the second winding in the third winding and the fourth winding, the balance of the signal synthesis network in the RF front-end module is improved, thereby improving the impedance / phase imbalance between the first power amplification unit and the second power amplification unit, solving the problem of excessive loss of the RF front-end module, and thereby improving the power synthesis efficiency of the RF front-end module.

[0149] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A radio frequency power amplifier, characterized in that: include: A first power amplification unit, a second power amplification unit and a signal synthesis network; The signal synthesis network includes a first winding, a second winding, a third winding and a fourth winding; The first power amplification unit is connected to the first winding, and the second power amplification unit is connected to the second winding; The first end of the third winding and the first end of the fourth winding are connected to the ground terminal, and the second end of the third winding and the second end of the fourth winding are connected to the signal transmission terminal; The third winding includes n coils M={m1, m2, m3, . . . , m n }, n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected to the ground terminal, and the nth coil m n One end of is connected to the signal transmission end; The fourth winding includes n coils K={k1, k2, k3, . . . , k n }, n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected to the ground terminal, and the nth coil k n One end of is connected to the signal transmission end; Among them, the sum of the number of coils in the third winding coupled with the first winding and the number of coils in the fourth winding coupled with the first winding is n, and the sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

2. The radio frequency power amplifier according to claim 1, characterized in that: The coil in the third winding coupled with the first winding, the coil in the fourth winding coupled with the first winding, and the first winding form a first coupling region; The coil in the third winding coupled with the second winding, the coil in the fourth winding coupled with the second winding, and the second winding form a second coupling region; The first coupling region and the second coupling region are adjacent and non-overlapping regions.

3. The radio frequency power amplifier according to claim 1, characterized in that: The coil m1 in the third winding is coupled to the first winding, and the coil m n The coil k1 in the fourth winding is coupled to the second winding, and the coil k2 in the fourth winding is coupled to the second winding. n coupled to the first winding; Alternatively, the coil m1 in the third winding is coupled to the second winding, and the coil m1 in the third winding is coupled to the second winding. n The coil k1 in the fourth winding is coupled to the first winding, and the coil k2 in the fourth winding is coupled to the first winding. n coupled to the second winding.

4. The radio frequency power amplifier according to claim 2, characterized in that: The grounding end of the third winding is arranged at the inner periphery of the first coupling region, the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region and / or the second coupling region, the grounding end of the fourth winding is arranged at the inner periphery of the second coupling region, and the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region and / or the second coupling region; Alternatively, the grounding end of the third winding is arranged at the inner periphery of the second coupling region, the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region and / or the second coupling region, the grounding end of the fourth winding is arranged at the inner periphery of the first coupling region, and the signal transmission end of the third winding is arranged at the outer periphery of the first coupling region and / or the second coupling region.

5. The radio frequency power amplifier according to claim 2, characterized in that: Taking the signal transmission end of the third winding as a starting point, the coil in the third winding coupled with the first winding is wound along a first direction, and the coil in the third winding coupled with the second winding is wound along a second direction; Taking the signal transmission end of the fourth winding as a starting point, the coil in the fourth winding coupled with the second winding is wound along the second direction, and the coil in the fourth winding coupled with the first winding is wound along the first direction; The first direction is a clockwise direction, and the second direction is a counterclockwise direction, or the first direction is a counterclockwise direction, and the second direction is a clockwise direction.

6. The radio frequency power amplifier according to claim 1, characterized in that: The third winding and the fourth winding are respectively arranged in different metal layers, or the third winding and the fourth winding are both arranged in the same metal layer.

7. The radio frequency power amplifier according to claim 1, characterized in that: Some of the n coils M of the third winding are arranged in one metal layer, and another part of the coils are arranged in another metal layer, and / or some of the n coils K of the fourth winding are arranged in one metal layer, and another part of the coils are arranged in another metal layer.

8. The radio frequency power amplifier according to claim 1, characterized in that: The first winding and the second winding are arranged in the second metal layer, the third winding is arranged in the first metal layer, and the fourth winding is arranged in the third metal layer. The third winding at least partially overlaps with the projection of the first winding and the second winding in the vertical direction, and the fourth winding at least partially overlaps with the projection of the first winding and the second winding in the vertical direction.

9. The radio frequency power amplifier according to claim 1, characterized in that: The first winding includes a first primary coil and a second primary coil; The second winding includes a third primary coil and a fourth primary coil; The first primary coil, the third primary coil and the third winding are arranged on the same metal layer, and the third winding is coupled with the first primary coil and the third primary coil on the same layer; The second primary coil, the fourth primary coil and the fourth winding are arranged on the same metal layer, and the fourth winding is coupled with the second primary coil and the fourth primary coil on the same layer.

10. The radio frequency power amplifier according to claim 1, characterized in that: Complementary winding A set M of the third winding coupled to the first winding 11 ={m a1 ,m a2 ,m a3 ,...,m an }, and the set of coil numbers {a1, a2, a3...an} in the fourth winding coupled to the second winding The coil numbers {a1, a2, a3...an} in the same; A set M of the third winding coupled to the second winding 21 ={m b1 ,m b2 ,m b3 ,...,m bn } and the set K of coil numbers {b1, b2, b3...bn} in the fourth winding coupled with the first winding 11 ={k b1 ,k b2 ,k b3 ,...,k bn } have the same coil numbers {b1,b2,b3...bn}.

11. The radio frequency power amplifier according to claim 1, characterized in that: The first winding is coupled to the odd-numbered coils in the third winding; the second winding is coupled to the even-numbered coils in the third winding, the first winding is coupled to the even-numbered coils in the fourth winding; the second winding is coupled to the odd-numbered coils in the fourth winding; Alternatively, the first winding is coupled to the even-numbered coils in the third winding; the second winding is coupled to the odd-numbered coils in the third winding, the first winding is coupled to the odd-numbered coils in the fourth winding; and the second winding is coupled to the even-numbered coils in the fourth winding.

12. The radio frequency power amplifier according to claim 1, characterized in that: The coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m4,m5,m8,m9,...m n-2 ,m n-1 }, where the coil set M 11 The serial number of the coil at the odd position is increased by 3 to be the next coil, and the serial number of the coil at the even position is increased by 1 to be the next coil; The coil set M in the second winding and the third winding 21 Coupling, M 21 ={m2,m3,m6,m7,m 10 ,...m m-3 ,m n }, where the coil set M 21 The serial number of the coil at the even position is increased by 1 to be the next coil; and the serial number of the coil at the odd position is increased by 3 to be the next coil; The coil set K in the first winding and the fourth winding 11 Coupling, K 11 ={k2,k3,k6,k7,k 10 ,...k m-3 ,k n }, where the coil set K 11 The serial number of the coil in the even position is increased by 1 to become the next coil: and the serial number of the coil in the odd position is increased by 3 For the next coil; The coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k4,k5,k8,k9,...k n-2 ,k n-1 }, where the coil set K 21 The serial number of the coil at the odd position is increased by 3 to be the next coil, and the serial number of the coil at the even position is increased by 1 to be the next coil.

13. The radio frequency power amplifier according to claim 1, characterized in that: The coil set M in the first winding and the third winding 11 Coupling, M 11 ={m1,m2,m5,m6,m9,...m n-1 ,m n }, where the coil set M 11 The serial number of the coil at the odd position is increased by 1 to be the next coil, and the serial number of the coil at the even position is increased by 3 to be the next coil; The coil set M in the second winding and the third winding 21 Coupling, M 21 ={m3,m4,m7,m8,m 11 ,...m m-3 ,m m-2 }, where the coil set M 21 The serial number of the coil at the odd position is increased by 1 to be the next coil; and the serial number of the coil at the even position is increased by 3 to be the next coil; The coil set K in the first winding and the fourth winding 11 Coupling, K 11 ={k3,k4,k7,k8,k 11 ,...k n-3 ,k n-2 }, where the coil set K 11 The serial number of the coil at the odd position is increased by 1 to be the next coil; and the serial number of the coil at the even position is increased by 3 to be the next coil; The coil set K in the second winding and the fourth winding 21 Coupling, K 21 ={k1,k2,k5,k6,k9,...k n-1 ,k n }, where the coil set K 21 The serial number of the coil at the odd position is increased by 1 to be the next coil, and the serial number of the coil at the even position is increased by 3 to be the next coil.

14. The radio frequency power amplifier according to claim 1, characterized in that: The n coils M of the third winding are arranged in different metal layers, divided into different coils in different metal layers, divided into different coils in different areas of the same metal layer, and divided into different coils at different levels in the same area; the n coils K of the third winding are arranged in different metal layers, divided into different coils in different metal layers, divided into different coils in different areas of the same metal layer, and divided into different coils at different levels in the same area.

15. The radio frequency power amplifier according to claim 1, characterized in that: The first power amplifying unit includes a first amplifying transistor, and the second power amplifying unit includes a second amplifying transistor; The input terminal of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the input terminal of the second amplifying transistor is connected to the second end of the second winding; Alternatively, the output end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is connected to the first end of the second winding, and the output end of the second amplifying transistor is connected to the second end of the second winding.

16. The radio frequency power amplifier according to claim 1, characterized in that: The first power amplifying unit includes a first amplifying transistor, and the second power amplifying unit includes a second amplifying transistor; The input end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is grounded or a power supply end, the input end of the second amplifying transistor is connected to the first end of the second winding, and the second end of the second winding is grounded or a power supply end; Alternatively, the output end of the first amplifying transistor is connected to the first end of the first winding, the second end of the first winding is grounded or a power supply end, and the output end of the second amplifying transistor is connected to the first end of the second winding, and the second end of the second winding is grounded or a power supply end.

17. The radio frequency power amplifier according to claim 1, characterized in that: The first power amplifying unit includes a first amplifying transistor and a third amplifying transistor, and the second power amplifying unit includes a second amplifying transistor and a fourth amplifying transistor; The input end of the first amplifying transistor is connected to the first end of the first winding, and the input end of the third amplifying transistor is connected to the The second end of the first winding is connected, the input end of the second amplifying transistor is connected to the second end of the second winding, and the input end of the fourth amplifying transistor is connected to the first end of the second winding; Alternatively, the output end of the first amplifying transistor is connected to the first end of the first winding, the output end of the third amplifying transistor is connected to the second end of the first winding, the output end of the second amplifying transistor is connected to the second end of the second winding, and the output end of the fourth amplifying transistor is connected to the first end of the second winding.

18. The radio frequency power amplifier according to claim 17, characterized in that: The first amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the first amplifying transistor is the input terminal of the first amplifying transistor, the collector of the first amplifying transistor is the output terminal of the first amplifying transistor, and the emitter of the first amplifying transistor is grounded; the second amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the second amplifying transistor is the input terminal of the second amplifying transistor, the collector of the second amplifying transistor is the output terminal of the second amplifying transistor, and the emitter of the second amplifying transistor is grounded; The third amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the third amplifying transistor is the input end of the third amplifying transistor, the collector of the third amplifying transistor is the output end of the third amplifying transistor, and the emitter of the third amplifying transistor is grounded; the fourth amplifying transistor is a BJT tube, including a base, a collector and an emitter, the base of the fourth amplifying transistor is the input end of the fourth amplifying transistor, the collector of the fourth amplifying transistor is the output end of the fourth amplifying transistor, and the emitter of the fourth amplifying transistor is grounded; Alternatively, the first amplifying transistor is a MOS transistor, including a gate, a source and a drain, the gate of the first amplifying transistor is the input end of the first amplifying transistor, the source of the first amplifying transistor is the output end of the first amplifying transistor, and the drain of the first amplifying transistor is grounded; the second amplifying transistor is a MOS transistor, including a gate, a source and a drain, the gate of the second amplifying transistor is the input end of the second amplifying transistor, the source of the second amplifying transistor is the output end of the second amplifying transistor, and the drain of the second amplifying transistor is grounded; The third amplifying transistor is a MOS tube, including a gate, a source and a drain. The gate of the third amplifying transistor is the input end of the third amplifying transistor, the source of the third amplifying transistor is the output end of the third amplifying transistor, and the drain of the third amplifying transistor is grounded; the fourth amplifying transistor is a MOS tube, including a gate, a source and a drain. The gate of the fourth amplifying transistor is the input end of the fourth amplifying transistor, the source of the fourth amplifying transistor is the output end of the fourth amplifying transistor, and the drain of the fourth amplifying transistor is grounded.

19. The radio frequency power amplifier according to claim 2, characterized in that: The first end of the third winding is connected to the ground terminal through the first capacitor, and the first end of the fourth winding is connected to the ground terminal through the second capacitor; The first capacitor is arranged in the first coupling region, and the second capacitor is arranged in the second coupling region, or the first capacitor is arranged outside the second coupling region, and the second capacitor is arranged outside the first coupling region.

20. The radio frequency power amplifier according to claim 2, characterized in that: The first end of the third winding and the first end of the fourth winding are connected to the ground through a third capacitor, and the third capacitor is arranged outside the first coupling region and outside the second coupling region.

21. A radio frequency front-end module, characterized in that: include: A substrate, and a first chip and a signal synthesis network arranged on the substrate, wherein the first chip includes a first power amplification unit and a second power amplification unit; The signal synthesis network includes a first winding, a second winding, a third winding and a fourth winding; The first power amplification unit is connected to the first winding, and the second power amplification unit is connected to the second winding; The first end of the third winding and the first end of the fourth winding are connected to the ground terminal, and the second end of the third winding and the second end of the fourth winding are connected to the signal transmission terminal; The third winding includes n coils M={m1, m2, m3, . . . , m n }, n is a positive integer greater than or equal to 2; wherein one end of the first coil m1 is connected to the ground terminal, and the nth coil m n One end of is connected to the signal transmission end; The fourth winding includes n coils connected in series between the ground terminal and the signal transmission terminal. K={k1,k2,k3,...,k n }, n is a positive integer greater than or equal to 2; wherein one end of the first coil k1 is connected to the ground terminal, and the nth coil k n One end of is connected to the signal transmission end; The sum of the number of coils in the third winding coupled to the first winding and the number of coils in the fourth winding coupled to the first winding is n, The sum of the number of coils in the third winding coupled with the second winding and the number of coils in the fourth winding coupled with the second winding is n.

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